870954981 has 16 divisors (see below), whose sum is σ = 1279688256. Its totient is φ = 523506816.

The previous prime is 870954947. The next prime is 870955021. The reversal of 870954981 is 189459078.

It is not a de Polignac number, because 870954981 - 2²⁶ = 803846117 is a prime.

It is a super-2 number, since 2×870954981² = 1517125157857420722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870954901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 258000 + ... + 261353.

It is an arithmetic number, because the mean of its divisors is an integer number (79980516).

Almost surely, 2^870954981 is an apocalyptic number.

It is an amenable number.

870954981 is a deficient number, since it is larger than the sum of its proper divisors (408733275).

870954981 is a wasteful number, since it uses less digits than its factorization.

870954981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519412.

The product of its (nonzero) digits is 725760, while the sum is 51.

The square root of 870954981 is about 29511.9464115805. The cubic root of 870954981 is about 954.9894395002.

The spelling of 870954981 in words is "eight hundred seventy million, nine hundred fifty-four thousand, nine hundred eighty-one".